5 * COMEDI - Linux Control and Measurement Device Interface
6 * Copyright (C) 1998 David A. Schleef <ds@schleef.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
22 #include "../comedidev.h"
24 #define I8255_SIZE 0x04
26 #define I8255_DATA_A_REG 0x00
27 #define I8255_DATA_B_REG 0x01
28 #define I8255_DATA_C_REG 0x02
29 #define I8255_CTRL_REG 0x03
30 #define I8255_CTRL_C_LO_IO (1 << 0)
31 #define I8255_CTRL_B_IO (1 << 1)
32 #define I8255_CTRL_B_MODE (1 << 2)
33 #define I8255_CTRL_C_HI_IO (1 << 3)
34 #define I8255_CTRL_A_IO (1 << 4)
35 #define I8255_CTRL_A_MODE(x) ((x) << 5)
36 #define I8255_CTRL_CW (1 << 7)
38 int subdev_8255_init(struct comedi_device *, struct comedi_subdevice *,
39 int (*io)(struct comedi_device *,
40 int, int, int, unsigned long),
41 unsigned long regbase);
43 int subdev_8255_mm_init(struct comedi_device *, struct comedi_subdevice *,
44 int (*io)(struct comedi_device *,
45 int, int, int, unsigned long),
46 unsigned long regbase);